描述

Also used as an ultraviscous solvent for ¹H NMR spectroscopy to better identify individual components in a complex mixture. The ultraviscous polymer solvent (mixed as 80% Halocarbon / 20% CDCl3) greatly reduces the molecular tumbling of small molecules, thereby making the nuclear Overhauser effect (NOE) very large and of negative sign.

In a NOESY experiment, the spectrum of the target molecule can be cleanly extracted from the mixture.